Inseam-trimming machine.



APPLICATION FILED JUNE 13, I918.

Patented Mar. 4,1919.

3 SHEETS-SHEET] A. J. THOMAS.

INSEAM TRIMMING MACHINE.

APPLICATION FILED mus I8, 1918.

1,296,570. Patented Mar. 4,1919.

3 SHEETS-SHEET 2- by I Patented M A. ,J. THOMAS. IINSEAM TRIMMINGMACHINE.

APPLICATION FILED JUNE 18. I918.

ms mums ains to. PNGHLUTMO, WASNINCYON, n. c.

edge.

ALFRED J. THOMAS, or BOSTON, MASSACHUSETTS.

INSEAIVLTRIMMING iaecnrivn.

To all whom it may concern; I

Be it known that L'ALFRED J. THOMAS, a citizen of the United States of America, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Inseam-Trimming Machines, of which the following is a specification.

Thisinvention relates to inseam trimming machines, and particularly to machines of this class in which. a rotary disk knife is used to trim off the surplus material ofthe upper, weltgand sole-lip after said upper and welt have been sewed to said sole-lip.

The object of the present invention is to produce a machine for this purpose by whichthe inseam may be more effectively trimmed, and particularly in the portions thereof where there are sharp curves.

The invention consists of providing the machine with a rotary disk knife, the front face of which is beveled ff to form a cutting having a trough therein which serves as a guide to direct the material to the trimming.

knife It further consists lilplOVlCllllg means for sharpening the knife during the trimming Operation.

The invention further consists incertain novel feati'i'res of construction and arrangement of parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Forthe purpose of illustrating the invention one preferred form thereof is illus-,

trated in the drawings, this form having been found togive satisfactory and reliable results, although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized and the invention is not limited to the precise arrangement and Or-,

ganization of these instrumentalities as herein shown and described, except as m- .quired by the scope of the appended claims.

Application filed June 18, 1918.

It further consists of an adjustable guide Specification of Letters Patent. 7 Patented llar, 1919,

Serial no. 241,072.

Fig. 2 represents a longitudinal section on line. 2, 2 on Fig. 1.

Fig. -3 represents a vertical transverse section'on line 3, 3 on Fig.2.

Fig. 41 represents an elevation of the left end of the machine and Fig. 5 represents a sectional detail to be hereinafter described In thedrawings, 10'is the top of a column to which is' secured a frame 11, having mounted in the base thereof an oscillating shaft 12, and provided at the top with alined bearings 13, in which is revolubly mounted theshaft 14;

"The shaft 14 is parallelto the oscillating shaftj12, and has at one end thereof an enlarged cone-shaped end 15 fitted to the coneshaped'bore of a bushing 16 in one of the bearings 13. i

Toithe end 15 of the shaft 1 1 is secured a disk knife 17 by means of a flati headed screw 18 threadedto the end 15 as indicated in dotted lines in Fig. 2.

' This knife 17 is circular and has its outer face beveled off at19 to form the cutting edge 20.

It has better results may be Obtained in trimming the inseam when a knife is used having the bevel 19 on the outer face,,tl'1an can be obtained by the use of a knife having the bevel on its rear face. i a

Between the bearings 13 the shaft 141 has secured thereto a driving pulley. 21 for imparting rotarymovement to said shaft 14.

, Onthe left hand end of the shaft 14, as viewed in Fig. 2, are secured the nuts 2223, and between the nut 23 and one of the'bearings 13 is'a fiber washer 24;.

Tlie nuts ;2223 prevent .end movement of said shaft 14:, and as the end 15 or bushing 16. becomes worn these nuts may be adjusted to takeup the wear, thereby providing a steady rotary movement of the knife 17 at all times.

The shaft l lchas a reduced end 20' to which there vis secured by set screws 26, a disk 27 having an outwardly extending ,hub-28.

"A tubular member 29 surrounds the hub- 28 and extends beyond the end thereof, and

this tubular member 29 has mounted in its outer end a closure 30 provided with a revoluble ball 31 centrally disposed therein.

On the left end of the oscillating shaft 12, as viewed in Fig. 2, is secured by set screw 32 a lever 33, the upper end of which is provided with a curved portion 34 concentric to the axis of the shaft 12.

This curved portion 34 has secured to its inner face by screws 35 (see Fi 1) a cam plate 36 the beveled portion 3 of which is normally in contact with the ball 31.

The tubular member 29 is adapted to slide endwise on the hub 28, and'has secured thereto a driving pulley 38 having a depression 39 in one face into which the disk 27 projects, and in this depression be tween said disk and pulley is a leather washer 40.

When the lever 33 is moved forward by the oscillation of the shaft 12 the cam surface 37 will force the pulley 38 into contact with leather washer 40 on the disk 27 with sufficient friction to cause the rotary movement of the shaft 14 to be transmitted through said disk 27 to the pulley 38.

In the forward movement of the lever 33 the cam surface 37 acting on the ball 31 will cause the clutch members 2738 to be brought into engagement, and then by the continued forward movement of the lever, the face 41 will be brought into contact with the ball 31 and retain said clutch members in engagement.

To the right hand endof the shaft 12, as viewed in Figs. 1 and 2, is secured a jointed arm 42, 43, the section 43 being pivoted at 44 to the rear end of the section 42 in such a manner that said section may be clamped in adjusted position at any angle relatively to the section 42. w

The outer end of the section 43 is provided with a slot 45 in which is adjustably secured a stud -46.

A fiberw asher47 surrounds the stud 46 and rests on the top face of the section 43.

Above the washer 47 and surrounding the stud 46 are two anti-friction devices 4849 separated by a sleeve 50. j V

Surrounding the sleeve 50 and driven on tothe anti-friction devices 48-49 is a bar rel 51 havingv a reduced end 52 on which is mounted an emery wheel 53 clamped against the end of the body of the barrel 51 by means of the nut 54.

A passage 55 extends through the reduced 7 end 52 into the interior of the barrel thereby providing means for the admission of a suitablelubricant, this passage 55 being endwise of the stud 46.

Inasmuch as the outer ring 58 of each anti-friction device is driven into the barrel 51 it. is obviousthat it would be impossible for the emery wheel 53 to be lifted while at same time it is free to rotate about the axis of the stud 46..

By this construction of bearing the emery dust is efiectually prevented from entering the bearing and thereby interfere with the proper operation of the machine.

The barrel 51 has secured thereto a grooved pulley 59 adapted to be driven from the pulley 38 by means of the belt 60.

This 'belt 60 is endless and passes partially around the intermediate pulleys 61 and 62, revolubly mounted on the trunnions 63 of a block 64, one trunnion 63 being secured in a member 65 ad'justably mounted on an arm 66 extending rearwardly from the frame 11. This arm may be adjusted about its axis and locked in adjusted position by means of the set screw 67, thereby varying the angle of the intermediate pulleys 61, 62. V

The arm 66 may also bemoved endwise to take up any slack in the belt. 60.

The section 42 of the arm supporting the emery wheel also has a forward extension 68 adapted to be operated by a treadle (not shown) to oscillate the shaft 12 and at the 7 same time move the emery wheel 53 into position to sharpen the beveled edge 19 of the disk knife 17.

This oscillation of the shaft 12 will move theflever 33 so that the clutch members 27 38 will become engaged, and rotary movement will be transmitted from the shaft 14 to the emery'wheel 53.

The lever 33 is provided with'a wing 70 having a rubber buffer 71 therein which is normally held in contact with the rib 72 of theframe 11 by means of the usualtreadle sprmg.

The frame 11 is provided with a groove 73 closed by a plate 7 4 and having mounted thereon a bar 75 whichis adapted to be adjusted endwise and locked in adjusted position by means of the set screw 76.

The forward end of the bar 75 has an upwardly projecting extension 77, the upper end of which is provided with a triangular groove in whichis positioned the shank 78 of the work guide 79.

A slit 80 extends from the triangular groove to the opposite edge "of said exten sion 77, and a clamping b0lt 81 extends across said slit and is adapted to be adjusted to clamp the work guide 79- to the extension 7 7 By loosening the bolt 81 the work guide;

79 may be adjusted endwise and then looked in position. 7

This work guide 79 is provided Watt peripheral groove 82 into which the knife IV'hen the claw edge .20 extends, and communicating with the top of "this groove 82 is a'trough .83 extending rearwardly therefrom.

, This trough 83 is so curved and shaped that when the surplus material is being trimmed, and the lasted shoeis being moved approximately in the direction of the arrow a, Fig. 1, the edges of the welt, upper and sole lip will be moved away from the sole into proper position to be presented to the knife edge 20.

By varying the position of the emery wheel 53 relatively to the section 43, and by moving the section 43 about the pivot 44, the inclination of the bevel 19 may be changed as desired.

The 'bar 75 is provided with a slot 84 in which is positioned the shank 85 of a block 86, having pivoted thereto a bifurcated claw 87 adapted to be inserted beneath the end of the welt of the shoe, with the stitches in the space between the two fingers of said claw.

87 has been inserted in this manner beneath the welt, the lasted shoe is moved with the claw 87 about the pivot of the latter into position so that the end of the welt may be chamfered off by. the knife 17 V r As soon as the end of the welt has been cut oif,.the lasted shoe is removed from the claw 87,. and 'saidclaw will be returned to its normal position by means of the spring 88 interposed between said claw and said block.86. a

By means of this machine the inseam may be trimmed off in anneven manner throughout .its entire length, the operator holdingjthe sole against the outer :end of the guide 7 9.

If the knife requires sharpening the emery wheelmay be brought into contact with the bevel 19 to accomplish this sharpening without stopping the machine.

iVhen the inseam has been trimmed the ends of the welt may be butted off on the oluble shaft, a rotary disk knife thereon;

an emery wheel; a work guide; and means slidably mounted on said shaft and adapted to be driven thereby to rotate said emery wheel when the latter has been moved into position to sharpen "the knife edge.

- "3. In an inseam trimming machine, arevoluble shaft, a disk knife secured to one end thereof; a. clutch member secured to the opposite end of said shaft; a second clutch member slidable endwise "of said shaft; and an oscillating arm having a cam face thereon adapted to move said slidable clutch member into engagement with the clutch member on said shaft.

4:. In an inseam trimming machine, a revoluble shaft, a 'disk knife secured to one end thereof; a clutch member secured to the opposite end of said shaft and having an outwardly extending hub; a second clutch member slidable endwise of said hub; and an oscillating .arm having a cam face thereon adapted to move said sl'idable clutch member into engagement with the clutch member on saidshaft.

5. In an inseam trimming machine, a revoluble shaft, a disk knife secured to one end thereof; a clutch member secured to the opposite end of said shaft andhaving an outwardly extending :hub; a second clutch member slidable endwise of said hub and having 'a tubular extension; a ball revolublymounted in said extension; and means acting on said ball for forcing said slidable clutch member into engagement with th clutch member on said shaft. 7

6. In an inseam trimming machine, a revo-luble shaft, a disk knife secured to one end thereof; a .clutch member secured to the opposite end of said shaftxand having an outwardly extending hub; a second clutch member slidable endwise of said hub and having a tubular extension; a ball revolubly mounted in said extension; and an oscillating arm having a cam facethereon coacting with said ball to force said clutch members into engagement.

7. In an inseam trimming machine, a rev.- oluble shaft, a disk knife secured to one end thereof; a disk secured to the opposite end'of said shaft; a pulley slidable endwise of said shaft and adapted to coact with and be driven by-said shaft; an oscillating shaft provided with means for forcing said pulley against said disk; an arm on the opposite end of said oscillating shaft; an emery wheelmounted on said arm; and means for transmitting rotary movement from said pulley to said emerywheel.

8. In an inseam tr1-mm1ng machine, a revol-uble shaft, a disk knife secured to one end thereof; a disk secured to the opposite end of said shaft; a pulley slidable endwise of said shaft and adapted to coact with and be driven by said shaft; an oscillating shaft.

provided with means for forcing said pulley against saiddisk an arm on the opposite end of said oscillating shaft; a stud secured to said arm; an emery wheel revolubly mounted on said stud; and means for transmitting rotary movement from said pulley to said emery wheel.

9. In an inseam trimming machine, a revoluble shaft; a disk knife secured to one end thereof; a disk secured to the opposite end of said shaft; a pulley slidable endwise of said shaft and adapted to coact with and be driven by said shaft; an oscillating shaft provided with means for forcing said pulley against said disk; an arm on the opposite end of said oscillating shaft; a stud secured to said arm; a barrel revolubly mounted on said stud; an emery Wheel secured to said barrel; and means for transmitting rotary movement from said pulley to said barrel.

10'. In an inseam trimming machine, a revoluble shaft; a disk knife secured to one end thereof; a disk secured to the op posite end of said shaft; a pulley slidable endwise of said shaft and adapted to coact with and be driven by said shaft; an oscillating shaft provided with means for forcing said pulley against said disk; an arm on the opposite end of said oscillating shaft; a stud secured to said arm; a barrel revolubly mounted on said stud; anti-friction members interposed between said barrel and stud; an emery wheel secured to said barrel; and means for transmitting rotary movement from said pulley to said barrel. 7

11. In an inseam trimming machine, a revolu ble shaft; a disk knife secured to one end thereof; a disk secured to the opposite end of said shaft; a pulley slidable endwise of said shaft and adapted to coact with and be driven by said shaft; an oscillating shaft; a lever on one end of said oscillating shaft provided with means for forcing said pulley against said disk; a hinged arm on the oppo site end of said oscillating shaft; an emery wheel mounted on said arm; and means for transmitting rotary movement from said pulley to said emery wheel.

12.'In an inseam trimming machine, a rotary disk knife and a work guide having a peripheral groove into which extends the cutting edge of said knife, and provided with a trough communicating with one end of said groove and inclined rearwardly therefrom.

13. In an inseam trimming machine, a rotary disk knife having its outer face beveled to form a cutting edge; a guide parallel to the axis thereof and having a peripheral groove into which extends the cutting edge of said knife; and means for adjusting said guide endwise.

14. In an inseam trimming machine, a rotary disk knife; a guide parallel to the axis thereof and having a peripheral groove into which extends the cutting edge of said knife;

15. In an inseam trimming machine, a revoluble shaft; a rotary knife secured to one end thereof; a revoluble emery wheel; means for moving said emery wheel into position to sharpen the knife; a barrel to which said emery wheel is secured; two separate rings in opposite ends of said barrel; astud; two separate rings on said stud; and anti-friction members interposed between the stud rings and the barrel rings. c

16. In an inseam trimming machine, a revoluble shaft; a rotary knife secured to one end thereof; a revoluble emery wheel; means for moving said emery wheel into position to sharpen the knife; a barrel to which said emery wheel is secured; two separate rings in opposite ends of said barrel; a stud;'two separate rings on said stud; means on said stud preventing end movement of the rings thereon; and anti-friction members inter-. posed between the stud rings and the barrel rings. 7 7

17. In an inseam trimming machine, a revoluble shaft; a rotary knife secured to one end thereof; a revoluble emery Wheel; means for moving said emery wheel into position to sharpen said knife; a barrel closed at the upper end and to which said emerywheel is secured; two separate rings in opposite ends of said barrel; a stud; two separate rings on said stud; and anti-friction members interposed between the stud rings and the barrel rings.

18. In an inseam trimming machine, a revoluble shaft; a rotary knife secured to one end thereof; a revoluble emery wheel;

means for moving said emery wheel into po-,

sition to sharpen said knife; a barrel provided with a reduced upper end to which said emery wheel is secured; two separate rings in opposite ends of said barrel; a stud; two separate rings on said stud; and anti friction member's interposed between the stud rings and the barrel rings.

19. In an inseam trimming machine, a

revoluble shaft; a rotary knife secured to one end thereof; a revoluble emery wheel; means for movlng said emery wheel lnto position to sharpen said knife; a barrel to which said emery wheel is secured closed at the upper end and having a normally closed passage in said upper end for the admission of lubricant to the interior of said barrel; two separate rings in opposite ends of said barrel; a stud; two separate rings on said stud; and anti-friction members interposed between the stud rings and the barrel rings.

20. In an inseam trimming machine, a-

rotary disk knife; a bifurcated claw adjacent to said knife the fingers of which are adapted to straddle the welt stitches; and

meanswhereby said claw may be moved into position to permit the knife to cut off the end of the welt at an angle to the face thereof.

21. In an inseam trimming machine, a rotary disk knife; a bifurcated claw adjacent to said knife the fingers of which are adapted to straddle the welt stitches; said claw being pivotally mounted so that it may be moved into position to permit the knife to cut off the end of the welt. at an angle to the face thereof.

22. In an inseam trimming machine, a rotary disk knife; a bifurcated claw adjacent to said knife the fingers of which are adapted to straddle the welt stitches; said claw being pivotally mounted so that it may be moved into position to permit the knife to cut off the end of the welt at an angle to the face thereof; and means for returning said-claw to its normal position.

23. In an inseam trimming machine, a ro- Copies of this patent may be obtained for tary disk knife; a bifurcated claw adjacent to said knife the fingers of which are adapted to straddle the welt stitches; means for adjusting the position of said claw relatively to said knife; and means whereby said claw may be'moved into position to permit the knife to chamfer off the end of the welt.

24. In an inseam trimming machine, a rotary disk knife; an adjustable bar parallel to the rear face of said knife and provided with a transverse slot therein; a block adjustably mounted in said slot; a bifurcated claw pivoted to said block with a face thereof adjacent the cutting edge of said knife; and a spring interposed between said block and claw and normally retaining said claw free from the knife edge.

Signed by me at 4, Post Office Square, Boston, Mass, this 9th day of April, 1918.

ALFRED J. THOMAS.

Witnesses:

WALTER E. LOMBARD, NATHAN C. LOMBARD.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

